I ordered a trial spiral brush when I needed to replace the original (flat) brush that came with the Neato D7. We have 2 dogs and a cat so I turn on the vacuum every day. I noticed that there is hair on the carpets every day. When I cleaned the dust box (daily), there was some hair and dust in it, but not as much as normal cleaning. When I turned the robot over, I found that the hair stuck together in the middle of the brush, where dust, dirt, and hair ended up in the trash can. I cleaned theโฆ